Malicious PDF — malware analysis report

Static analysis result for SHA-256 509f7f9ce85f4353…

MALICIOUS

PDF

48.0 KB Created: 2020-08-13 22:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c8c22877a2415954d4988b6b004532 SHA-1: 26c81e57dfeb9a3e8916f376845ba2c27b8498f1 SHA-256: 509f7f9ce85f4353e292a7a601d155d5e90de9bf7b56995c93b424826ef3a6c2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests the PDF is designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=pardoner%2527+s+tale+summary+pdf
    • http://files.whippetclubofscotland.co.uk/uploads/1/3/1/3/131381452/xuwezuno_jimedolakuj_zotoxoxatex_tegawe.pdf
    • http://files.bluebirdupcycledstyle.ca/uploads/1/3/1/4/131407045/1154738.pdf
    • http://bavus.markbland.net/uploads/1/3/2/6/132695569/c5effa08.pdf
    • http://files.alisonpilkington.com/uploads/1/3/0/7/130775151/06a0f99b3c22444.pdf
    • http://files.brighterhorizonsbrighton.com/uploads/1/3/1/4/131437689/xiwegutarujufoguguze.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/songs_from_lilo_and_stitch.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/kujunapojamagi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/estimation_costing_and_valuation_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/vejanilepezojigel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/38848637936.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/negonudufos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/82615468831.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/ropedemuxiwimekuxivuxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/kazetajukesufomemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/memefexodijawazarigerew.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e4e.bin
b3d8538e7075b23167a79ffdd10a1d3aece5c6db359c3060d4ef23a7c43dc508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 5324 bytes
font_01_sfnt_off00009065.bin
a9785099cae724caa190bda309e657e121b8910ed75e35193a13e7a86ebcba3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 10056 bytes

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